在禁食期间,GR-KLF15通路控制肝脂发生
Yoshinori Takeuchi1,2,3, Yuki Murayama1,2, Yuichi Aita1,2
1Nutrigenomics Research Group, Institute of Medicine, University of Tsukuba, Tsukuba, Japan.
The FEBS journal
|September 13, 2023
概括
在禁食期间,葡萄糖皮质体受体 (GR) 通过控制克鲁佩尔样因子15 (KLF15) 和固醇调节元素结合蛋白-1 (SREBP-1) 的表达来调节肝脏脂肪的产生. 这一途径对于新陈代谢适应禁食至关重要.
科学领域:
- 代谢调节 代谢调节 代谢调节
- 分子生物学分子生物学
- 内分泌学 在内分泌学.
背景情况:
- 禁食诱导了新陈代谢的转变,抑制了脂质生成,并激活了葡萄糖生成.
- 固醇调节元素结合蛋白-1 (SREBP-1) 是脂质生成调节的关键,在禁食期间被抑制.
- 克鲁佩尔样因子15 (KLF15) 与肝脏X受体相互作用以调节SREBP-1,但其禁食诱导机制尚不清楚.
研究的目的:
- 为了阐明禁食期间KLF15诱导的机制.
- 调查葡萄糖皮质体受体 (GR) 在调节肝脏KLF15表达和禁食期间的脂质生成中的作用.
- 了解HPA轴,GR,KLF15和SREBP-1在禁食诱导的代谢适应中的相互作用.
主要方法:
- 使用KLF15淘汰赛小鼠来评估KLF15在GR介导的SREBP-1抑制中的必要性.
- 在禁食期间检查了GR与KLF15增强剂的结合.
- 研究了GR-KLF15-SREBP-1通路在禁食期间肝脏脂肪生成中的作用.
主要成果:
- 葡萄糖皮质体受体 (GR) 在禁食期间直接调节肝脏KLF15的表达.
- KLF15对于GR介导的SREBP-1抑制和随后的肝脂生成减少至关重要.
- 在禁食反应中,GR表现出对KLF15增强剂的增强结合,这表明它参与了禁食反应.
结论:
- 由HPA轴调节的GR-KLF15通路是控制禁食期间肝脂发生的关键机制.
- 这一途径突显了脂质新陈代谢的复杂分子调节,以响应营养状况.
- 这些发现提供了关于禁食期间代谢适应的荷尔蒙控制的见解.
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